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This week a very special and well-deserved guest made his, or her, debut to late-night television. The Madagascar Hissing Cockroach made a guest appearance on Chelsea Handler’s “Chelsea Lately” show. Chelsea herself was actually absent as host, so funnyman and Leno sidekick Ross Matthews was filling in behind the desk. Animal enthusiast Mireya Mayor couldn’t get it to actually hiss, but it did a great job of scaring the laughs out of Mr. Matthews.